Develop Reference

Handling Click Event for menu Used for Floating Action Button Options

I used a library recently that Provides a Floating Action Button and changing to a Something like Navigation bar by clicking on it.
but i cant set click Event for my navigation bar Items.
after Pressing on items i don't see any reaction!
Anyone can help me?
fabOptions = (FabOptions) findViewById(R.id.fabcontainer);
fabOptions.setButtonsMenu(R.menu.menu1);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu1, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.back:
newBack();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
private void newBack() {
Toast.makeText(this, "back", Toast.LENGTH_SHORT).show();
}
}

First of all you should have to use break whenever you use switch statement otherwise the program will go to default status. so use break; the code below.
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getId(); // Retrieve the id of the selected menu item
switch(id) {
case R.id.back:
newBack();
return true;
break;
case ...
}
return super.onOptionsItemSelected(item);
}

Changing toolbar button icon from AlertDialog "Cannot resolve symbol"

Faced with impossibility to change toolbar button icon from AlertDialog. ("Cannot resolve symbol").
Tried to declare toolbar button in other places in a code and got no result. Please help to solve it. How should I declare this button to avoid this error?
//Menu
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu, menu);
MenuItem mChangeCur = menu.findItem(R.id.change_cur);
mChangeCur.setIcon(R.drawable.usd);
MenuItem mSearch = menu.findItem(R.id.action_search);
SearchView mSearchView = (SearchView) mSearch.getActionView();
mSearchView.setQueryHint("Search");
mSearchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
#Override
public boolean onQueryTextSubmit(String query) {
return false;
}
#Override
public boolean onQueryTextChange(String newText) {
adapter.getFilter().filter(newText);
return true;
}
});
return super.onCreateOptionsMenu(menu);
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
Intent intent;
switch (item.getItemId()) {
case R.id.change_cur:
// setup the alert builder
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("Choose currency");
// add a list
String[] currencies = {"USD", "RUB", "AUD", "BRL", "CAD"};
builder.setItems(currencies, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case 0:
cur = "USD";
new Refresh().execute();
mChangeCur.setIcon(R.drawable.rub); //Here is mistake
break;
case 1:
cur = "RUB";
new Refresh().execute();
mChangeCur.setIcon(R.drawable.rub); //Here is mistake
break;
case 2:
case 3:
case 4:
default:
break;
}
}
});

Problem was in declaring and initialization mChangeCur. I had to declare mChangeCur on class level and initialize in public boolean onCreateOptionsMenu(Menu menu)

Hide or Show a Menu Item if Webview Class Activated?

I am trying to disable programmatically a menu item if WebView class is not activated.
I tried this code:
#Override
public boolean onPrepareOptionsMenu(Menu menu)
{
super.onPrepareOptionsMenu(menu);
MenuItem item = menu.findItem(R.id.itemRefresh);
if (WebViewFragment.viewContentWebView.isActivated()){
item.setVisible(true);
item.setEnabled(true);
} else
{
item.setVisible(true);
item.setEnabled(false);
}
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case R.id.itemRefresh:
WebViewFragment.viewContentWebView.reload();
return true;
case R.id.itemAdd:
//oke im gonna write here
return true;
case R.id.itemHelp:
// ok ok i will
return true;
default:
return true;
}
}
In Eclipse I don't get any error msg but on real device App blocks itself.
I think I'm doing something wrong in IF-ELSE statement part.
Thank you.

How to hide an optionsmenu button at runtime

In my app i have an optionsmenu. It has 2 buttons. Depending on a boolean value i would like to show/hide one of the buttons. I've got the following code but it doesn't hide the button. How can i do this?
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.layout.menushowmoredetails, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if(displayRotaDetails.equalsIgnoreCase("false")){
if(item.getItemId() == R.id.moredetails)
item.setVisible(false);
}
switch (item.getItemId()) {
case R.id.back:
onBackPressed();
return true;
case R.id.moredetails:

You have to use the onPrepareOptionMenu method like this:
#Override
public boolean onPrepareOptionsMenu(Menu menu) {
super.onPrepareOptionsMenu(menu);
// add your conditions here and change 0 with the R.id.moredetails item postion.
if(displayRotaDetails.equalsIgnoreCase("false")){
menu.getItem(1).setVisible(false);
}
}

Menu doesn't appear after linking to another page with phonegap

I use phonegap,
When linking to another page with simple href my menu stop working.
In my Java class I override onKeyDown() and return false for menu button
#Override
public boolean onKeyDown(int i,KeyEvent e){
if (i==KeyEvent.KEYCODE_MENU){
return false;
}else{
return true;
}
}
When I loadUrl from the java class I can open the menu (in about.html)
#Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main_menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.exit:
this.finish();
return true;
case R.id.about:
super.loadUrl("file:///android_asset/www/about.html");
return true;
default:
return super.onOptionsItemSelected(item);
}
}